#18BDB7
Closest named color: Topaz (#13BBAF). oklch(72.2% 0.121 190.7), rgb(24, 189, 183).
Aa
Black text reads best on this color (9.00:1).
About this color
#18BDB7 is a medium-light, moderately saturated teal or cyan. In OKLCH its lightness is 72%, its chroma 0.121 and its hue 191°. Its hue sits on the cool side of the wheel. The nearest named color is Topaz (#13BBAF), ΔE 0.012 away. Black text reads best on it, at 9.00:1.
| Hue family | Teals and cyans |
| Lightness | medium-light (72%) |
| Chroma | moderately saturated (0.121) |
| Temperature | cool |
| Nearest name | Topaz (#13BBAF) |
| Black text | 9.00:1 |
| White text | 2.33:1 |
Values
| HEX | #18BDB7 |
| RGB | rgb(24, 189, 183) |
| HSL | hsl(178, 77%, 42%) |
| OKLCH | oklch(72.2% 0.121 190.7) |
Contrast
WCAG 2 contrast ratios are the conformance target: AA needs 4.5:1 for body text and 3:1 for large text, AAA needs 7:1. APCA Lc values are supplementary guidance from the WCAG 3 drafts.
| Pair | WCAG 2 | Result | APCA | APCA guidance |
|---|---|---|---|---|
| White text on #18BDB7 | 2.33:1 | Fails | Lc -50.3 | Large or bold text, headings |
| Black text on #18BDB7 | 9.00:1 | AAA | Lc 58.5 | Large or bold text, headings |
| #18BDB7 text on white | 2.33:1 | Fails | Lc 45.5 | Large or bold text, headings |
| #18BDB7 text on black | 9.00:1 | AAA | Lc -56.6 | Large or bold text, headings |
Tints and shades
A 50–950 scale built in OKLCH: the hue is held, lightness follows a Tailwind v4-like curve, and every step is kept inside the sRGB gamut. This color sits at step 400.
-
Step 50
50
#EEF8F7
oklch(97.1% 0.011 189.8)
-
Step 100
100
#DAEFED
oklch(93.6% 0.022 189.9)
-
Step 200
200
#BAE3DF
oklch(88.6% 0.043 189.1)
-
Step 300
300
#85D1CC
oklch(81% 0.076 190.5)
-
Step 400
400 (this color)
#18BDB7
oklch(72.2% 0.121 190.7)
-
Step 500
500
#009E99
oklch(63.1% 0.109 190.8)
-
Step 600
600
#008580
oklch(55.7% 0.096 190.1)
-
Step 700
700
#00706C
oklch(49.2% 0.085 190.4)
-
Step 800
800
#005C58
oklch(42.8% 0.074 189.6)
-
Step 900
900
#004C4A
oklch(37.6% 0.065 191.7)
-
Step 950
950
#002D2C
oklch(26.9% 0.046 192.5)
#18BDB7 with color blindness
Simulated with the Machado et al. (2009) model. ΔE is how far the color moves: below about 0.02 you would not notice a change.
| Vision | Seen as | Shift (ΔE) |
|---|---|---|
| Protanopia (no red cones) | #B1B3B7 | 0.128 |
| Deuteranopia (no green cones) | #9CA3B8 | 0.120 |
| Tritanopia (no blue cones) | #00C3BB | 0.016 |
| Achromatopsia (no color) | #AAAAAA | 0.122 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #18BDB7
#18BDB7
oklch(72.2% 0.121 190.7)
- #E68493
#E68493
oklch(72.3% 0.121 10.7)
Analogous
Neighbouring hues, 30° either side.
Split complementary
The two hues beside the complement (150° and 210°).
Triadic
Three hues spaced 120° apart.
Palettes with this color
Curated palettes that contain a color within ΔE 0.04 (OKLab) of #18BDB7, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Topaz #13BBAF ΔE 0.012
- Light Sea Green #20B2AA ΔE 0.032
- Turquoise Blue #06B1C4 ΔE 0.045
- Greeny Blue #42B395 ΔE 0.048
- Dark Turquoise #00CED1 ΔE 0.052
- Medium Turquoise #48D1CC ΔE 0.065
- Green Blue #01C08D ΔE 0.065
- Medium Aquamarine #66CDAA ΔE 0.071
Use #18BDB7 in your product
Turn it into light and dark UI roles checked for contrast, then export to Tailwind v4, shadcn/ui, CSS or design tokens.